Fabrication and characterization of silver polycrystalline photocathode

被引：6

作者：

Anjum, Faizan ^{[1
]}

Nasir, Hamza ^{[1
]}

Lee, J. ^{[2
]}

Kim, H. J. ^{[1
,2
]}

机构：

[1] Kyungpook Natl Univ, Dept Phys, 80 Daehakro, Daegu 41566, South Korea

[2] Kyungpook Natl Univ, Ctr High Energy Phys, 80 Daehakro, Daegu 41566, South Korea

来源：

OPTIK | 2022年 / 269卷

基金：

新加坡国家研究基金会;

关键词：

Metallic photocathode; Reflection mode; Transmission mode; Work function; Physical vapor deposition; Photocurrent; Quantum efficiency; Photodetector; WORK FUNCTION;

D O I：

10.1016/j.ijleo.2022.169906

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Silver is considered the most noble metal after gold, which makes it a potential candidate for the metallic photocathode. In this article, we report on the fabrication of a polycrystalline silver photocathode by using a physical vapor deposition (PVD) technique. For the first time, silver photocathodes in both the reflection and transmission modes were fabricated on a super quartz (JGS1) substrate and characterized. The polycrystalline nature of the fabricated sample was confirmed by X-ray diffraction (XRD) analysis. The work function of the fabricated photocathode was measured at around 4.73 eV using photoemission yield spectroscopy in the air (PYSA). Photocurrent measurement and quantum efficiency (Q.E.) calculations were performed using a picoammeter and a 250 nm high power ultraviolet (UV) LED source. Silver photocathode yielded a Q.E. of (8.77 +/- 0.90) x 10(-6) in reflection mode, and (1.20 +/- 0.12) x 10(-6) in transmission mode. After being exposed to air for up to 72 h, no sign of degradation in its photocurrent/Q.E. was observed. The silver photocathode thickness was estimated to be (138 +/- 5) nm for the reflection mode and (35 +/- 1) nm for the transmission mode. The developed photocathode will be ultimately used for the study of the proposed novel photodetector concept called silicon photomultiplier tube (SiPMT).

引用

页数：8

共 23 条

[1]

Bradley D. J., 1970, Applied Physics Letters, V16, P53, DOI 10.1063/1.1653097

[2]

Chatterjee S., 1977, Regression analysis by example.

[3] WORK FUNCTION MEASUREMENTS ON (110), (100) AND (111) SURFACES OF SILVER [J].

CHELVAYOHAN, M ;

MEE, CHB .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1982, 15 (10) :2305-2312

[4]

Chodorow M., 2002, REFERENCE DATA ENG, Vninth, DOI [10.1016/B978-075067291-7/50018-2, DOI 10.1016/B978-075067291-7/50018-2]

[5] RESULTS FROM THE AVERAGE POWER LASER EXPERIMENT PHOTOCATHODE INJECTOR TEST [J].

DOWELL, DH ;

BETHEL, SZ ;

FRIDDELL, KD .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1995, 356 (2-3) :167-176

[6]

Emma P, 2010, NAT PHOTONICS, V4, P641, DOI [10.1038/NPHOTON.2010.176, 10.1038/nphoton.2010.176]

[7] Photoelectric work functions of (100) and (111) faces of silver single crystals and their contact potential difference [J].

Farnsworth, HE ;

Winch, RP .

PHYSICAL REVIEW, 1940, 58 (09) :812-819

[8] The analysis of photoelectric sensitivity curves for clean metals at various temperatures [J].

Fowler, RH .

PHYSICAL REVIEW, 1931, 38 (01) :45-56

[9] A pulsed electron gun for ultrafast electron diffraction at surfaces [J].

Janzen, A. ;

Krenzer, B. ;

Heinz, O. ;

Zhou, P. ;

Thien, D. ;

Hanisch, A. ;

Heringdorf, F. -J. Meyer zu ;

von der Linde, D. ;

von Hoegen, M. Horn .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2007, 78 (01)

[10]

Kim H.J., 2020, patent registration, Patent No. 1021035770000

← 1 2 3 →